diff --git a/bonobo/_api.py b/bonobo/_api.py
index a566c58..c57a255 100644
--- a/bonobo/_api.py
+++ b/bonobo/_api.py
@@ -24,7 +24,6 @@ from bonobo.strategies import create_strategy
 
 __all__ += ['create_strategy']
 
-
 # Extract and loads from stdlib.
 from bonobo.io import *
 from bonobo.io import __all__ as _all_io
diff --git a/bonobo/_version.py b/bonobo/_version.py
index fc79d63..020ed73 100644
--- a/bonobo/_version.py
+++ b/bonobo/_version.py
@@ -1 +1 @@
-__version__ = '0.2.1'
+__version__ = '0.2.2'
diff --git a/bonobo/commands/run.py b/bonobo/commands/run.py
index aa232d4..62f15c4 100644
--- a/bonobo/commands/run.py
+++ b/bonobo/commands/run.py
@@ -59,7 +59,13 @@ def execute(file, quiet=False):
 
     # todo if console and not quiet, then add the console plugin
     # todo when better console plugin, add it if console and just disable display
-    return bonobo.run(graph, plugins=[], services=get_default_services(file.name, context.get(DEFAULT_SERVICES_ATTR)() if DEFAULT_SERVICES_ATTR in context else None))
+    return bonobo.run(
+        graph,
+        plugins=[],
+        services=get_default_services(
+            file.name, context.get(DEFAULT_SERVICES_ATTR)() if DEFAULT_SERVICES_ATTR in context else None
+        )
+    )
 
 
 def register(parser):
diff --git a/bonobo/config/services.py b/bonobo/config/services.py
index 8634868..86bc06b 100644
--- a/bonobo/config/services.py
+++ b/bonobo/config/services.py
@@ -11,6 +11,7 @@ def validate_service_name(name):
         raise ValueError('Invalid service name {!r}.'.format(name))
     return name
 
+
 class Service(Option):
     """
     A Service is a special kind of option defining a dependency to something that will be resolved at runtime, using an
@@ -55,7 +56,7 @@ class Container(dict):
     def __new__(cls, *args, **kwargs):
         if len(args) == 1:
             assert not len(kwargs), 'only one usage at a time, my dear.'
-            if not(args[0]):
+            if not (args[0]):
                 return super().__new__(cls)
             if isinstance(args[0], cls):
                 return cls
@@ -67,11 +68,7 @@ class Container(dict):
         except AttributeError:
             options = {}
 
-        return tuple(
-            option.resolve(mixed, self)
-            for name, option in options.items()
-            if isinstance(option, Service)
-        )
+        return tuple(option.resolve(mixed, self) for name, option in options.items() if isinstance(option, Service))
 
     def get(self, name, default=None):
         if not name in self:
@@ -82,7 +79,3 @@ class Container(dict):
         if isinstance(value, types.LambdaType):
             value = value(self)
         return value
-
-
-
-
diff --git a/bonobo/core/__init__.py b/bonobo/core/__init__.py
index f5f8416..086efcc 100644
--- a/bonobo/core/__init__.py
+++ b/bonobo/core/__init__.py
@@ -1,2 +1 @@
 """ Core required libraries. """
-
diff --git a/bonobo/examples/datasets/_services.py b/bonobo/examples/datasets/_services.py
index 9998961..36d3b18 100644
--- a/bonobo/examples/datasets/_services.py
+++ b/bonobo/examples/datasets/_services.py
@@ -4,6 +4,4 @@ import bonobo
 
 
 def get_services():
-    return {
-        'fs': bonobo.open_fs(dirname(__file__))
-    }
+    return {'fs': bonobo.open_fs(dirname(__file__))}
diff --git a/bonobo/examples/files/_fixme_json_handlers.py b/bonobo/examples/files/_fixme_json_handlers.py
index 37300f4..26d42c4 100644
--- a/bonobo/examples/files/_fixme_json_handlers.py
+++ b/bonobo/examples/files/_fixme_json_handlers.py
@@ -4,10 +4,7 @@ from bonobo.commands.run import get_default_services
 # XXX does not work anymore because of filesystem service, can't read HTTP
 url = 'https://data.toulouse-metropole.fr/explore/dataset/theatres-et-salles-de-spectacles/download?format=json&timezone=Europe/Berlin&use_labels_for_header=true'
 
-graph = bonobo.Graph(
-    bonobo.JsonReader(path=url),
-    print
-)
+graph = bonobo.Graph(bonobo.JsonReader(path=url), print)
 
 if __name__ == '__main__':
     bonobo.run(graph, services=get_default_services(__file__))
diff --git a/bonobo/examples/files/_services.py b/bonobo/examples/files/_services.py
index 27eb71a..337bf6b 100644
--- a/bonobo/examples/files/_services.py
+++ b/bonobo/examples/files/_services.py
@@ -2,6 +2,4 @@ from bonobo import get_examples_path, open_fs
 
 
 def get_services():
-    return {
-        'fs': open_fs(get_examples_path())
-    }
+    return {'fs': open_fs(get_examples_path())}
diff --git a/bonobo/examples/tutorials/tut02_01_read.py b/bonobo/examples/tutorials/tut02_01_read.py
index 1c11a32..64816ce 100644
--- a/bonobo/examples/tutorials/tut02_01_read.py
+++ b/bonobo/examples/tutorials/tut02_01_read.py
@@ -8,10 +8,8 @@ graph = bonobo.Graph(
 
 
 def get_services():
-    return {
-        'fs': bonobo.open_fs(bonobo.get_examples_path())
-    }
+    return {'fs': bonobo.open_fs(bonobo.get_examples_path())}
+
 
 if __name__ == '__main__':
     bonobo.run(graph, services=get_default_services(__file__, get_services()))
-
diff --git a/bonobo/execution/__init__.py b/bonobo/execution/__init__.py
index ad2defc..b8a83dd 100644
--- a/bonobo/execution/__init__.py
+++ b/bonobo/execution/__init__.py
@@ -1,3 +1 @@
 from bonobo.execution.graph import GraphExecutionContext, NodeExecutionContext, PluginExecutionContext
-
-
diff --git a/bonobo/execution/base.py b/bonobo/execution/base.py
index c8357d6..9a96cb1 100644
--- a/bonobo/execution/base.py
+++ b/bonobo/execution/base.py
@@ -30,7 +30,8 @@ class LoopingExecutionContext(Wrapper):
         if services:
             if parent:
                 raise RuntimeError(
-                    'Having services defined both in GraphExecutionContext and child NodeExecutionContext is not supported, for now.')
+                    'Having services defined both in GraphExecutionContext and child NodeExecutionContext is not supported, for now.'
+                )
             self.services = Container(services) if services else Container()
         else:
             self.services = None
diff --git a/bonobo/io/csv.py b/bonobo/io/csv.py
index df84557..9192fc3 100644
--- a/bonobo/io/csv.py
+++ b/bonobo/io/csv.py
@@ -55,7 +55,7 @@ class CsvReader(CsvHandler, FileReader):
 
         for row in reader:
             if len(row) != field_count:
-                raise ValueError('Got a line with %d fields, expecting %d.' % (len(row), field_count,))
+                raise ValueError('Got a line with %d fields, expecting %d.' % (len(row), field_count, ))
 
             yield dict(zip(headers.value, row))
 
diff --git a/bonobo/structs/__init__.py b/bonobo/structs/__init__.py
index bd9361e..15e76a9 100644
--- a/bonobo/structs/__init__.py
+++ b/bonobo/structs/__init__.py
@@ -2,6 +2,4 @@ from bonobo.structs.bags import Bag
 from bonobo.structs.graphs import Graph
 from bonobo.structs.tokens import Token
 
-__all__ = [
-    'Bag', 'Graph', 'Token'
-]
+__all__ = ['Bag', 'Graph', 'Token']
diff --git a/bonobo/util/compat.py b/bonobo/util/compat.py
index 35b2500..68c4c9c 100644
--- a/bonobo/util/compat.py
+++ b/bonobo/util/compat.py
@@ -32,7 +32,8 @@ def deprecated_alias(alias, func):
         warnings.simplefilter('always', DeprecationWarning)  # turn off filter
         warnings.warn(
             "Call to deprecated function alias {}, use {} instead.".format(alias, func.__name__),
-            category=DeprecationWarning, stacklevel=2
+            category=DeprecationWarning,
+            stacklevel=2
         )
         warnings.simplefilter('default', DeprecationWarning)  # reset filter
         return func(*args, **kwargs)
diff --git a/bonobo/util/iterators.py b/bonobo/util/iterators.py
index cdf02a7..142b35a 100644
--- a/bonobo/util/iterators.py
+++ b/bonobo/util/iterators.py
@@ -20,10 +20,10 @@ def force_iterator(mixed):
 def ensure_tuple(tuple_or_mixed):
     if isinstance(tuple_or_mixed, tuple):
         return tuple_or_mixed
-    return (tuple_or_mixed,)
+    return (tuple_or_mixed, )
 
 
 def iter_if_not_sequence(mixed):
     if isinstance(mixed, (dict, list, str)):
         raise TypeError(type(mixed).__name__)
-    return iter(mixed)
\ No newline at end of file
+    return iter(mixed)
diff --git a/docs/changelog.rst b/docs/changelog.rst
index ea9eaa0..f9e2145 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -1,8 +1,18 @@
 Changelog
 =========
 
-v.0.2.1
-:::::::
+v.0.2.2 - 28 apr 2017
+:::::::::::::::::::::
+
+* First implementation of services and basic injection.
+* Default service configuration for directories and files.
+* Code structure refactoring.
+* Critical bug fix in default strategy causing end of pipeline not to terminate correctly.
+* Force tighter dependency management to avoid unexpected upgrade problems.
+* Filesystems are now injected as a service, using new filesystem2 (fs) dependency.
+
+v.0.2.1 - 25 apr 2017
+:::::::::::::::::::::
 
 * Plugins (jupyter, console) are now auto-activated depending on the environment when using bonobo.run(...).
 * Remove dependencies to toolz (which was unused) and blessings (which caused problems on windows).
diff --git a/setup.py b/setup.py
index ed9b4da..5b276f8 100644
--- a/setup.py
+++ b/setup.py
@@ -40,40 +40,36 @@ setup(
     name='bonobo',
     description='Bonobo',
     license='Apache License, Version 2.0',
-    install_requires=[
-        'colorama ==0.3.9', 'fs ==2.0.3', 'psutil ==5.2.2',
-        'requests ==2.13.0', 'stevedore ==1.21.0'
-    ],
+    install_requires=['colorama ==0.3.9', 'fs ==2.0.3', 'psutil ==5.2.2', 'requests ==2.13.0', 'stevedore ==1.21.0'],
     version=version,
     long_description=read('README.rst'),
     classifiers=read('classifiers.txt', tolines),
     packages=find_packages(exclude=['ez_setup', 'example', 'test']),
     include_package_data=True,
-    data_files=[('share/jupyter/nbextensions/bonobo-jupyter', [
-        'bonobo/ext/jupyter/static/extension.js',
-        'bonobo/ext/jupyter/static/index.js',
-        'bonobo/ext/jupyter/static/index.js.map'
-    ])],
+    data_files=[
+        (
+            'share/jupyter/nbextensions/bonobo-jupyter', [
+                'bonobo/ext/jupyter/static/extension.js', 'bonobo/ext/jupyter/static/index.js',
+                'bonobo/ext/jupyter/static/index.js.map'
+            ]
+        )
+    ],
     extras_require={
         'dev': [
-            'coverage >=4,<5', 'pylint >=1,<2', 'pytest >=3,<4',
-            'pytest-cov >=2,<3', 'pytest-timeout >=1,<2', 'sphinx',
+            'coverage >=4,<5', 'pylint >=1,<2', 'pytest >=3,<4', 'pytest-cov >=2,<3', 'pytest-timeout >=1,<2', 'sphinx',
             'sphinx_rtd_theme', 'yapf'
         ],
         'jupyter': ['jupyter >=1.0,<1.1', 'ipywidgets >=6.0.0.beta5']
     },
     entry_points={
         'bonobo.commands': [
-            'init = bonobo.commands.init:register',
-            'run = bonobo.commands.run:register',
+            'init = bonobo.commands.init:register', 'run = bonobo.commands.run:register',
             'version = bonobo.commands.version:register'
         ],
         'console_scripts': ['bonobo = bonobo.commands:entrypoint'],
-        'edgy.project.features':
-        ['bonobo = '
-         'bonobo.ext.edgy.project.feature:BonoboFeature']
+        'edgy.project.features': ['bonobo = '
+                                  'bonobo.ext.edgy.project.feature:BonoboFeature']
     },
     url='https://www.bonobo-project.org/',
-    download_url=
-    'https://github.com/python-bonobo/bonobo/tarball/{version}'.format(
-        version=version), )
+    download_url='https://github.com/python-bonobo/bonobo/tarball/{version}'.format(version=version),
+)
diff --git a/tests/io/test_file.py b/tests/io/test_file.py
index 75740e9..dc011a1 100644
--- a/tests/io/test_file.py
+++ b/tests/io/test_file.py
@@ -9,7 +9,7 @@ from bonobo.util.testing import CapturingNodeExecutionContext
 @pytest.mark.parametrize(
     'lines,output',
     [
-        (('ACME',), 'ACME'),  # one line...
+        (('ACME', ), 'ACME'),  # one line...
         (('Foo', 'Bar', 'Baz'), 'Foo\nBar\nBaz'),  # more than one line...
     ]
 )
diff --git a/tests/test_config.py b/tests/test_config.py
index e8cf2b9..3c46fbc 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -33,7 +33,9 @@ class ConcretePrinter(PrinterInterface):
 
 
 class MyServiceDependantConfigurable(Configurable):
-    printer = Service(PrinterInterface, )
+    printer = Service(
+        PrinterInterface,
+    )
 
     def __call__(self, printer: PrinterInterface, *args):
         return printer.print(*args)
diff --git a/tests/test_execution.py b/tests/test_execution.py
index 921e8d9..5f9067b 100644
--- a/tests/test_execution.py
+++ b/tests/test_execution.py
@@ -10,7 +10,7 @@ def generate_integers():
 
 
 def square(i: int) -> int:
-    return i ** 2
+    return i**2
 
 
 @contextual
diff --git a/tests/test_publicapi.py b/tests/test_publicapi.py
index 888e462..0ce6323 100644
--- a/tests/test_publicapi.py
+++ b/tests/test_publicapi.py
@@ -14,4 +14,3 @@ def test_wildcard_import():
             continue
 
         assert name in bonobo.__all__
-